HD 189733b transmission spectra. Top left: comparison of the transmission spectra retrieved with CaRM, with ARoME, for different setups (see text). The bins centered near 545 nm are aligned for better comparison. After, a comparison between our result and Pont et al. (2013) observed with Hubble (STIS), Di Gloria et al. (2015) with HARPS, and Oshagh et al. (2020) which combines HARPS and CARMENES data. Shifts where applied to compare with the various literature sources.